Zech, Oliver and Bauduin, Pierre and Palatzky, Peter and Touraud, Didier and Kunz, Werner (2010) Biodiesel, a sustainable oil, in high temperature stable microemulsions containing a room temperature ionic liquid as polar phase. Energy & Environmental Science 3 (6), pp. 846-851.
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Biodiesel has gained more and more attention in recent years resulting from the fact that it is made of renewable resources. Parallel to its environmental compatibility, biodiesel also exhibits a high thermal stability. We demonstrate here that biodiesel can replace conventional oils as apolar phase in nonaq. microemulsions contg. the room temp. ionic liq. ethylammonium nitrate as polar phase. In addn. to the phase diagram and the viscosity of the microemulsions, we study the thermal stability of these systems. Along an exptl. path in the phase diagram, no phase change could be obsd. between 30 C and 150 C. Cond. measurements confirm the high thermal stability of these systems. The microemulsion exhibits a percolative behavior between 30 C and 150 C. Small angle X-ray scattering spectra show a single broad scattering peak similar to aq. microemulsions. The spectra could well be described by the Teubner-Strey model. Furthermore, the adaptability of different models ranging from bicontinuous structures to ionic liq. in oil spheres as well as disordered open connected cylinders has been checked. These high temp. stable, nonaq., free of crude oil based org. solvent microemulsions highlight an efficient way towards the formulation of environmentally compatible microemulsions and open a wide field of potential.
|Institutions:||Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > Prof. Dr. Werner Kunz|
|Subjects:||500 Science > 540 Chemistry & allied sciences|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||13 May 2011 07:53|
|Last Modified:||13 May 2011 07:53|
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